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Heating, ventilation, and air conditioning (HVAC) is the use of various technologies to control the temperature, humidity, and purity of the air in an enclosed space. Its goal is to provide thermal comfort and acceptable indoor air quality. HVAC system design is a subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics, and heat transfer. "Refrigeration" is sometimes added to the field's abbreviation as HVAC&R or HVACR, or "ventilation" is dropped, as in HACR.
Hitachi, Ltd. is a Japanese multinational conglomerate corporation headquartered in Chiyoda, Tokyo, Japan. It is the parent company of the Hitachi Group and had formed part of the Nissan zaibatsu and later DKB Group and Fuyo Group of companies before DKB and Fuji Bank merged into the Mizuho Financial Group. As of 2020, Hitachi conducts business ranging from IT, including AI, the Internet of Things, and big data, to infrastructure.
A refrigerant is a working fluid used in the refrigeration cycle of air conditioning systems and heat pumps where in most cases they undergo a repeated phase transition from a liquid to a gas and back again. Refrigerants are heavily regulated due to their toxicity, flammability and the contribution of CFC and HCFC refrigerants to ozone depletion and that of HFC refrigerants to climate change.
Mitsubishi Electric Corporation, established on 15 January 1921, is a Japanese multinational electronics and electrical equipment manufacturing company headquartered in Tokyo, Japan. It is one of the core companies of Mitsubishi. The products from MELCO include elevators and escalators, high-end home appliances, air conditioning, factory automation systems, train systems, electric motors, pumps, semiconductors, digital signage, and satellites.
Johnson Controls International is an American Irish-domiciled multinational conglomerate headquartered in Cork, Ireland, that produces fire, HVAC, and security equipment for buildings. As of mid-2019, it employed 105,000 people in around 2,000 locations across six continents. As of 2017, it was listed as 389th in the Fortune Global 500; in 2017, it became ineligible for the Fortune 500, as it was headquartered outside the U.S.
American Standard Companies was a manufacturer of heating, ventilation, and air conditioning (HVAC) systems, plumbing fixtures, and automotive parts. The company was formed in 1929 through the merger of the American Radiator Company and Standard Sanitary Manufacturing Company forming the American Radiator and Standard Sanitary Corporation. The name was simplified to American Standard in 1967.
In the United States, the efficiency of air conditioners is often rated by the seasonal energy efficiency ratio (SEER) which is defined by the Air Conditioning, Heating, and Refrigeration Institute, a trade association, in its 2008 standard AHRI 210/240, Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment. A similar standard is the European seasonal energy efficiency ratio (ESEER).
An air handler, or air handling unit, is a device used to regulate and circulate air as part of a heating, ventilating, and air-conditioning (HVAC) system. An air handler is usually a large metal box containing a blower, heating or cooling elements, filter racks or chambers, sound attenuators, and dampers. Air handlers usually connect to a ductwork ventilation system that distributes the conditioned air through the building and returns it to the AHU. Sometimes AHUs discharge (supply) and admit (return) air directly to and from the space served without ductwork
Air conditioning, often abbreviated as A/C (US), AC (US), or air con (UK), is the process of removing heat from an enclosed space to achieve a more comfortable interior environment and in some cases also strictly controlling the humidity of internal air. Air conditioning can be achieved using a mechanical 'air conditioner' or alternatively a variety of other methods, including passive cooling or ventilative cooling. Air conditioning is a member of a family of systems and techniques that provide heating, ventilation, and air conditioning (HVAC). Heat pumps are similar in many ways to air conditioners, but use a reversing valve to allow them to both heat and also cool an enclosed space.
Thermo King is an American manufacturer of transport temperature control systems for refrigerator trucks and trailers, refrigerated containers and refrigerated railway cars along with heating, ventilation and air conditioning systems for bus and passenger rail applications. Headquartered in the Minneapolis suburb of Bloomington, Minnesota. Thermo King is a subsidiary of Trane Technologies.
American Standard Brands is a North American manufacturer of plumbing fixtures, based in Piscataway, New Jersey, United States. It is principally owned by the Lixil Group, with Bain Capital Partners holding a minority stake. The company was formed as American Standard Americas from the North American operations of the kitchen and bathroom division of the American Standard Companies during a breakup of the company in 2007. Crane Plumbing and Eljer were merged into the company in 2008 creating American Standard Brands.
Ingersoll Rand is an American multinational company that provides flow creation and industrial products. The company was formed in February 2020 through the spinoff of the industrial segment of Ingersoll-Rand plc and its merger with Gardner Denver. Its products are sold under more than 40 brands across all major global markets.
Trane is a manufacturer of heating, ventilation, and air conditioning (HVAC) systems, along with building management systems and controls. The company is a subsidiary of Trane Technologies, a company focused on manufacturing HVAC and refrigeration systems. Trane employs more than 29,000 people at 104 manufacturing locations in 28 countries, and has annual sales of more than US$8 billion.
Watsco, Inc. is the largest distributor of air conditioning, heating and refrigeration equipment, and related parts and supplies (HVAC/R) in the United States. Watsco was founded more than 60 years ago as a manufacturer of parts, components, and tools used in the HVAC/R industry. From 1973 to 1988 Watsco, under the leadership of its current CEO, Albert H. Nahmad, grew from US$5 million in revenues to US$25 million. In 1989, the company shifted its focus from manufacturing to distribution, by acquiring Gemaire Distributors Inc., a South Florida-based Rheem distributor. By 1997, Watsco added other OEMs to the mix, and moved into commercial refrigeration, as a result of the acquisition of Baker Distributing Company. Watsco divested its manufacturing business in 1998, selling it to International Comfort Products Corporation, now part of Carrier Corporation (Carrier). Revenues increased from US$64.1 million in 1989 to US$6.3 billion in 2021 via a strategy of acquiring companies with established market positions, and subsequently building revenues and profit through a combination of adding locations, products, services, and other initiatives.
Trane Technologies is an Irish-domiciled holding company focused on the manufacturing of heating, ventilation, and air conditioning (HVAC) and refrigeration systems. The company traces its corporate history back more than 150 years and was created after a series of mergers and spin offs. In 2008, HVAC manufacturer Trane was acquired by Ingersoll Rand, an industrial tools manufacturer. In 2020, the tools business was spun off as Ingersoll Rand and the remaining company was renamed Trane Technologies.
Mitsubishi Electric United States is the principal subsidiary of Mitsubishi Electric Corporation in the United States. It is headquartered in Cypress, California and was incorporated in 2002 and its affiliates, have roughly 31 locations throughout North America with approximately 5,000 employees. Its main affiliate companies are: Mitsubishi Electric Power Products, Inc.; Mitsubishi Electric US, Inc.; Mitsubishi Electric Automotive America, Inc.; Mitsubishi Electric Automation, Inc.; and Mitsubishi Electric Research Laboratories, Inc.
Variable refrigerant flow (VRF), also known as variable refrigerant volume (VRV), is an HVAC technology invented by Daikin Industries, Ltd. in 1982. Like ductless minisplits, VRFs use refrigerant as the cooling and heating medium. This refrigerant is conditioned by one or more condensing units, and is circulated within the building to multiple indoor units. VRF systems, unlike conventional chiller-based systems, allow for varying degrees of cooling in more specific areas, may supply hot water in a heat recovery configuration without affecting efficiency, and switch to heating mode during winter without additional equipment, all of which may allow for reduced energy consumption. Also, air handlers and large ducts are not used which can reduce the height above a dropped ceiling as well as structural impact as VRF uses smaller penetrations for refrigerant pipes instead of ducts.
Midea Group is a Chinese electrical appliance manufacturer, headquartered in Beijiao town, Shunde District, Foshan, Guangdong and listed on Shenzhen Stock Exchange. As of 2021, the firm employs approximately 150,000 people in China and overseas with 200 subsidiaries and over 60 overseas branches. Midea Group is listed on Shenzhen Stock Exchange since 2013. It has been listed on the Fortune Global 500 since July 2016. Midea produces lighting, water appliances, floor care, small kitchen appliances, laundry, large cooking appliances, and refrigeration appliances. It is the largest microwave oven manufacturer, and acts an OEM for many brands. It also has a long history in producing home and commercial products in heating, ventilation and air conditioning (HVAC). It is the world's largest producer of robots and appliances.
Rheem Manufacturing Company is an American privately held manufacturer that produces residential and commercial water heaters and boilers, as well as heating, ventilating and air conditioning (HVAC) equipment. The company also produces and sells products under the Ruud brand name. It is a subsidiary of Paloma Industries. What became Rheem started in 1925 as a supplier of packaging to the petroleum industry, and is currently headquartered in Atlanta, Georgia in the United States. The company is one of the largest manufacturers of both water heating and HVAC equipment in the United States, and also produces and markets products in Argentina, Armenia, Australia, Bahrain, China, Chile, Brazil, Canada, Iraq, Kuwait, Mexico, New Zealand, Perú, Oman, Qatar, Saudi Arabia, Singapore, UAE, and Ukraine.
Sanden Corporation is a Japanese, Isesaki, Gunma-based automotive equipment and electrical equipment manufacturing company and is listed on the Tokyo Stock Exchange.
References
- ↑ "Ingersoll Rand and Mitsubishi Electric Corporation to Establish Joint Venture for Ductless and Variable Refrigerant Flow Heating and Air Conditioning Systems in the U.S. and Select Latin America Countries" (PDF). mitsubishielectric.com. Mitsubishi Electric Corporation. Retrieved 15 October 2018.
- ↑ "Mitsubishi Electric Trane HVAC Now Serving Ductless Customers". ir.ingersollrand.com. Ingersoll-Rand plc. Retrieved 15 October 2018.
- ↑ "IR and Mitsubishi in US joint venture". Cooling Post. Cooling Post Ltd. Retrieved 17 January 2019.
